VBA Sendmail error trap

I'm using this function to send order acknowledgements to customers. Unfortunately it crashes if the email address is invalid. How can I change this to send an error (to myself) if it crashes?
I have tried an error trap but it does not seem to work: -

Hi mbizup
Thanks for your suggestion, I did try something similar but I will go with your code and see what happens. Only problem is I won't know if it works until it crashes again (which could be next week) : )

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